Heritabilities and Genetic Correlations of Body Condition Score and Calving Interval with Yield, Somatic Cell Score, and Linear Type Traits in Brown Swiss Cattle
- 1 December 2007
- journal article
- Published by American Dairy Science Association in Journal of Dairy Science
- Vol. 90 (12), 5737-5743
- https://doi.org/10.3168/jds.2007-0280
Abstract
This study aimed to estimate genetic parameters for body condition score (BCS), calving interval (CI), somatic cell score (SCS), yield, and linear type traits for the Italian Brown Swiss cattle population. A total of 32,359 records of first-parity lactating cows were collected from 2002 to 2004 in 4,885 dairy herds. The pedigree file included 96,661 animals. Multiple-trait animal models were analyzed using REML to estimate (co)variance components without repeated observations on traits. The estimated heritability was 0.15 for BCS, 0.05 for CI, and 0.06 for SCS, and ranged from 0.09 to 0.14 for test-day yield traits and from 0.07 to 0.32 for linear type traits. The genetic correlations of CI with yield and most linear type traits were positive, whereas the correlation between CI and BCS was negative (-0.35). For type traits, BCS showed, in general, a moderately negative genetic correlation except for strength, pastern, and heel height. The genetic correlation of CI or BCS with SCS was moderately low but favorable (0.19 and -0.26, respectively). The estimated correlations indicated that selection for greater yield and type traits can exert unfavorable effects on the reproductive ability of cows. To counterbalance these effects and to carry out early prediction of breeding values of bulls for fertility, inclusion of BCS in the breeding program is advisableKeywords
Funding Information
- Trento Province
- Superbrown Consortium of Bolzano
This publication has 24 references indexed in Scilit:
- Correlations Among Body Condition Scores from Various Sources, Dairy Form, and Cow Health from the United States and DenmarkJournal of Dairy Science, 2004
- Evaluation of Body Condition Score Measured Throughout Lactation as an Indicator of Fertility in Dairy CattleJournal of Dairy Science, 2004
- Heritabilities and Correlations Among Body Condition Score, Dairy Form and Selected Linear Type TraitsJournal of Dairy Science, 2003
- Heritability and Correlations Among Body Condition Score Loss, Body Condition Score, Production and Reproductive PerformanceJournal of Dairy Science, 2002
- Genetic Parameters for Level and Change of Body Condition Score and Body Weight in Dairy CowsJournal of Dairy Science, 2002
- Test-Day Genetic Analysis of Condition Score and Heart Girth in Holstein Friesian CowsJournal of Dairy Science, 2001
- Effect of Herd Environment on the Genetic and Phenotypic Relationships Among Milk Yield, Conception Rate, and Somatic Cell Score in Holstein CattleJournal of Dairy Science, 2000
- Genetic and Phenotypic Parameters for 305-Day Yield, Fertility, and Survival in HolsteinsJournal of Dairy Science, 1998
- Performance and genetic parameters for fertility of seasonal dairy cows in New ZealandLivestock Production Science, 1997
- A Body Condition Scoring Chart for Holstein Dairy CowsJournal of Dairy Science, 1989